Last week, it came to light that a simple text message can crash Messages on any iPhone it's sent to. Apple has explained how you can fix it if you're affected — but why can it happen in the first place?
In this video, Tom Scott investigates the theories that have been suggested thus far, casts aside the ones that are clearly nonsense and investigates the ones that could hold true. He goes as far to suggest the one he thinks is correct — but we'll have to wait for a little while to find out for sure. [YouTube]